<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        /*
        Promise.reject:
            -默认返回一个失败的promise实例，值是reject接受的实参（无论这个实参是不是promise实例），快速把一个值包装成promise实例
        */ 

        const result = Promise.reject(1);
        console.log("result",result);

        const result2 = Promise.reject(new Promise((resolve,reject)=>{
            // resolve(1)
            reject("err")
        }));
        console.log("result2",result2);
    </script>
</body>
</html>